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  1. Magnetoelastic coupling enabled tunability of magnon spin current generation in two-dimensional antiferromagnets
Magnetoelastic coupling enabled tunability of magnon spin current generation in two-dimensional antiferromagnets
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Magnetoelastic coupling enabled tunability of magnon spin current generation in two-dimensional antiferromagnets

Bazazzadeh, N

Magnetoelastic coupling enabled tunability of magnon spin current generation in two-dimensional antiferromagnets

Bazazzadeh, N ; Sharif University of Technology | 2021

511 Viewed
  1. Type of Document: Article
  2. DOI: 10.1103/PhysRevB.104.L180402
  3. Publisher: American Physical Society , 2021
  4. Abstract:
  5. We theoretically investigate the magnetoelastic coupling (MEC) and its effect on magnon transport in two-dimensional antiferromagnets with a honeycomb lattice. MEC coefficients along with magnetic exchange parameters and spring constants are computed for monolayers of transition-metal trichalcogenides with Néel magnetic order (MnPS3 and VPS3) and zigzag order (CrSiTe3, NiPS3, and NiPSe3) by ab initio calculations. Using these parameters, we predict that the spin-Nernst coefficient is significantly enhanced due to magnetoelastic coupling. Our study shows that although Dzyaloshinskii-Moriya interaction can produce spin-Nernst effect in these materials, other mechanisms such as magnon-phonon coupling should be taken into account. We also demonstrate that the magnetic anisotropy is an important factor for control of magnon-phonon hybridization and enhancement of the Berry curvature and thus the spin-Nernst coefficient. Our results pave the way toward gate tunable spin current generation in two-dimensional magnets by spin-Nernst effect via electric field modulation of MEC and anisotropy. © 2021 American Physical Society
  6. Keywords:
  7. Chromium compounds ; Electric fields ; Honeycomb structures ; Magnetic anisotropy ; Magnetism ; Manganese compounds ; Monolayers ; Nickel compounds ; Phonons ; Phosphorus compounds ; Selenium compounds ; Silicon compounds ; Transition metals ; A: Honeycomb ; Coupling coefficient ; Current generation ; Honeycomb lattices ; Magnetoelastic couplings ; Nernst coefficients ; Nernst effect ; Spin currents ; Tunabilities ; Two-dimensional antiferromagnet ; Calculations
  8. Source: Physical Review B ; Volume 104, Issue 18 , 2021 ; 24699950 (ISSN)
  9. URL: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.104.L180402